[1] EUGIN Grp, Res & Dev, Barcelona, Spain
[2] Clin EUGIN, Clin Embryol, EUGIN Grp, Barcelona, Spain
[3] CIRH EUGIN Grp, Clin Embryol, Barcelona, Spain
[4] Hosp Ruber Int, Unidad Mujer, Clin Embryol, Madrid, Spain
[5] Inst Bernabeu, Clin Embriol, Alicante, Spain
[6] Hosp QuironSalud Barcelona, Clin Embryol, Unidad Reprod Asistida, Barcelona, Spain
[7] Hosp QuironSalud Barcelona, Clin Embryol, Unidad Reprod Asistida, Malaga, Spain
[8] Novagen Cegyr Med & Genet Reprod, EUGIN Grp, Reprod Genet, Buenos Aires, DF, Argentina
[9] Hosp QuironSalud Zaragoza, Unidad Reprod Asistida, Clin Embryol, Zaragoza, Spain
[10] EUGIN Grp, Corp Med, Barcelona, Spain
[11] Leiden Univ, Med Ctr, Dept Anat & Embryol, Einthovenweg Leiden, Netherlands
[12] Ghent Univ Hosp, Ghent Fertil & Stem Cell Team G FAST, Dept Reprod Med, Ghent, Belgium